The innovative GMAX 40V Lithium-Ion Battery delivers high performance and efficiency among all greenworks GMAX tools. A quick charge time of 120 minutes for a 2 AH battery makes the NEW greenworks GMAX Series of lawn tools a great option when looking to replace gas powered products. Featuring a simple snap on and off design for ease of use and innovative battery charge level indicator with one USB charging port. Lithium-ion batteries offer no negative memory effect, consistent fade free power throughout its entire run cycle and 3 times longer run time than NiCad batteries. From mowing and edging, to trimming and blowing, you can now complete your yard work with one battery platform that will provide you with the power and performance you need to get the job done quickly and efficiently. Become more efficient when working in your yard by purchasing the greenworks GMAX 40V Lithium-Ion Series of lawn tools. This interchangeable battery platform offers all the tools you need to complete your yard work without sacrificing performance or power.(NOT compatible with previous greenworks 40V tools)Lithium-Ion batteries can be charged any time with no negative memory effect, so they will be at peak power even after hundreds of charge cycles. Even a few minutes of charging gives you enough full power to finish the job.